stunthanger.com
Electric Stunt => Gettin all AMP'ed up! => Topic started by: Mark Mc on November 16, 2023, 02:15:08 PM
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Normally, a battery is chosen for the specific plane/motor you're building. But yesterday I was engaged in my never ending task of cleaning my workroom and found that I have nine(!) 3S 2200 mAh batteries. Since I told a fellow club member that I'd draw up and cut out a plane kit for him, I thought it'd be just as easy to draw up a simple plane to to haul these around and cut the parts out. Something along the lines of a Flying Models Stunt Trainer. It'd be easy to size the fuselage to slip in the batteries: https://outerzone.co.uk/plan_details.asp?ID=3939
I did a search in the Post Your Setup thread for "3S 2200" and did not get even one result. So I thought I'd ask here. I figure I could quickly build a plane using the above method and have a basic electric plane for my basic flying abilities, if I just had an idea of what size to make the wing.
What say Ye?
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It might help to know what motors you are considering. I think that dictates the plane size more than the battery. All of the BadAss motors will run on 3s to 6s batteries. The 23xx's will run on 2s. I am guessing you check the wing area on some vintage designs that were for .19 size engines. 30-40" wings 250-300sq" Electric motors are real chameleons. Change the prop and the rpm's and your .15 is now a .29.
Ken
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I have a Ringmaster with the following setup:
Motor, Cobra 2221/10 KV 1500
Battery, Hyperion 3S 1600 70C
ESC< Trunigy Plush 30 amp
Timer, KR. Initial RPMs set to 9500
Weight ready to launch is 25 oz.
Prop APC electric 9x6
So I would say a Ringmaster size ship (or some bigger) would work.
Ringmaster:
Wing Span: 42 in.
Plane Length: 27-3/4 in.
Wing Area: 382 sq. in.
Engine: .15 - .40
I suppect up to 400 sq in would be appropriate. Also desired run time factures in. For sport I run 4 minutes (enough for an 83 year old). Most folkes run 5.5 minutes. The time it takes to do a full pattern.
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Mark,
At the 2021 Brodak contest, I won a Brodak F-51 Mustang built by Dennis Adamisin and set up for electric power. It uses 3S x 2200 mAh batteries. It is a fun little flyer --- I won Warbird Stunt at the Roanoke Rapids meet and placed in the top 3 in several Profile Stunt meets. The Brodak F-51 is a re-kit of the old Sterling F-51. Specs are as follows:
wingspan: 38"
wing area: 323 sq in
weight: 24 oz
lines: .012" x 60'
batteries: 3S 2200mAh
motor: Cobra 2808/22 1330kV
ESC: BadAss Rebel 25A
timer: Brodak FM-0c
prop: APC 9x6 electric (pusher)
motor speed: 9600 rpm, measured on the ground with a Royal digital tachometer
This set-up gives me a lap time of 5.2 seconds, I can complete the modern stunt pattern in +/- 5 minutes, and I set the timer to stop at 5:30 total run time. To date, I have 127 flights on it.
Hope this helps.
Kermit